Focused Laser Differential Interferometry: Recent Developments and Applications for Flow Measurements
Focused laser differential interferometry (FLDI), first introduced in the 1970s, has developed
into a powerful tool for the analysis of turbulent dynamics and fluctuations in fluid flows …
into a powerful tool for the analysis of turbulent dynamics and fluctuations in fluid flows …
Significance of the smaller scales for hypersonic turbulent boundary layers with focused laser differential interferometry
While designed to suppress disturbances located away from its beam foci, focused laser
differential interferometry (FLDI) is known to have some integration of signals along its …
differential interferometry (FLDI) is known to have some integration of signals along its …
Combined experimental and numerical investigation of a hypersonic turbulent boundary layer by means of FLDI and large-eddy simulations
This work investigates a hypersonic turbulent boundary layer over a 7° half angle cone at a
wall-to-total temperature ratio of 0.1, M∞= 7.4 and R e∞ m= 4.2× 10 6 m− 1, in terms of …
wall-to-total temperature ratio of 0.1, M∞= 7.4 and R e∞ m= 4.2× 10 6 m− 1, in terms of …
[HTML][HTML] Displacement of hypersonic boundary layer instability and turbulence through transpiration cooling
P Kerth, LM Le Page, S Wylie, R Ravichandran… - Physics of …, 2024 - pubs.aip.org
Hypersonic boundary-layer transition onset is commonly characterized in wind tunnel
experiments by measuring the surface heat transfer rise above the laminar level …
experiments by measuring the surface heat transfer rise above the laminar level …
Modification of Mach 6 Freestream Flow by Pitot Probe Bow Shock as Measured by Line FLDI and SAFS
JM Weisberger, BF Bathel, GC Herring… - AIAA SciTech 2025 …, 2025 - arc.aiaa.org
Measurements of the flow in front of flat-face Pitot probes in NASA Langley Research
Center's 20-Inch Mach 6 Air Tunnel were made using a 35-point line focused laser …
Center's 20-Inch Mach 6 Air Tunnel were made using a 35-point line focused laser …
Experimental investigation about the aerodynamic noise caused by hypersonic turbulence
X Liu, S Yi - Physics of Fluids, 2024 - pubs.aip.org
In this study, experimental investigations pertaining to aerodynamic noise are conducted in
a hypersonic quiet wind tunnel, which possesses the unique capability of operating in both …
a hypersonic quiet wind tunnel, which possesses the unique capability of operating in both …
Imaging focused laser differential interferometry
AW Marsh, AN Kramer, KN Maranto… - Optics Letters, 2024 - opg.optica.org
Focused laser differential interferometry (FLDI) is an important diagnostic for measuring
density fluctuations in high-speed flows. Currently, however, high dynamic range FLDI is …
density fluctuations in high-speed flows. Currently, however, high dynamic range FLDI is …
Attenuation of the acoustic noise radiated by a compressible boundary layer through injection of a vibrationally active gas
GI Gillespie, SJ Laurence - Experiments in Fluids, 2024 - Springer
The effects of vibrational nonequilibrium processes on turbulence-generated acoustic noise
were investigated in a Mach-2.8 shock-tunnel facility. Gas mixtures with relevant absorption …
were investigated in a Mach-2.8 shock-tunnel facility. Gas mixtures with relevant absorption …
Non-intrusive velocimetry in a supersonic reacting flow using two-point focused laser differential interferometry
View Video Presentation: https://doi. org/10.2514/6.2023-0223. vid Two-point focused laser
differential interferometry (2pFLDI) is shown to be a viable technique for making non …
differential interferometry (2pFLDI) is shown to be a viable technique for making non …
Noise generated in a scramjet combustor
R Ananthapadmanaban, TJ McIntyre… - Journal of Spacecraft …, 2024 - arc.aiaa.org
This paper presents the noise levels generated inside a two-dimensional scramjet
combustor at Mach 7.3 freestream using the focused laser differential interferometric (FLDI) …
combustor at Mach 7.3 freestream using the focused laser differential interferometric (FLDI) …